iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
A code graph can show how a project is organized; a session timeline can show how work unfolded. The open-source session-trail Claude Code plugin puts sessions in separate lanes, marks prompts and selected milestones, and connects work that continues in a later session. It is designed to complement a code graph, not replace one.
What the timeline shows
In the author’s description, the timeline is a history of selected work across Claude Code sessions. Each session occupies its own lane. Milestone nodes represent a decision or a completed piece of work, while curves connect a later session to an earlier line of work when it continues across sessions. Small ticks mark prompts along the time axis.
Time moves linearly within a session, but idle gaps are compressed so distinct periods of activity can be viewed together. Selecting a milestone reveals its title, what happened, why and how, nearby file touches, the session ID, and a path to the local transcript. Selecting a prompt tick shows the original prompt text.
This gives the timeline a different job from a code-structure graph: the graph describes relationships in the project, while the timeline arranges recorded prompts and selected work chronologically, including links between sessions. The author presents the two views as companions.
#1 Best Overall
How prompts and milestones are recorded
The repository describes two different capture paths. Hooks record sessions, prompts, file touches, and session titles. Milestones are selective: when the agent judges that a decision, reversal, completed unit, or cross-session continuation is worth recording, it sends a short brief to a Sonnet scribe subagent. The scribe drafts the milestone’s title, what, why, and how; its rationale is required to include rejected alternatives.
A session-end safety net can create an automatic node if work took place without a milestone being recorded. That fallback does not make every important decision guaranteed to appear. The project documentation describes its intended behavior, not independent tests of how consistently it captures rationale.
“The prompt ticks matter: they are the mechanical, complete record of what you asked, independent of the LLM’s judgment.”
Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.— The project author, session-trail README
The distinction matters when reading the visualization: prompt ticks are described as hook-recorded events, whereas milestone summaries depend on the agent’s judgment and a scribe’s drafting. The README’s statement is the author’s design claim, not an independently verified guarantee.
Install and open the viewer
The project README lists Node.js 18 or newer and says session-trail has no npm dependencies. Its documented Claude Code setup is:
- In Claude Code, add the marketplace with
/plugin marketplace add jsk4581/session-trail. - Install the plugin with
/plugin install session-trail@session-trail. - Open the timeline with
/session-trail:view.
The README also documents a manual note command and CLI commands for showing, searching, querying file history, serving the viewer, and checking the installation. Consult the repository README for the exact command syntax and current setup details.
Rank #4
Where the history is stored—and what to check before sharing
According to the README, records live in the project’s .session-trail/ directory. It includes an append-only events.jsonl file and a derived graph cache. You can commit this directory to share the history with teammates, or add it to .gitignore to keep it personal.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minutePrompts are recorded verbatim and truncated at 2,000 characters. That can make the event file sensitive: prompts may contain internal details or other information you do not intend to share. Review .session-trail/events.jsonl before committing the directory, and choose deliberately whether the team needs the recorded history.
Best Value
- Hardcover notebook with line-ruled pages (front and back); ideal for notes, lists, journaling, and more
- 240 pages
- Archival quality; acid free
- Expandable inner pocket for storing loose items
- Includes bookmark and elastic closure
The README says the viewer binds to 127.0.0.1 by default and that data endpoints require a per-start token. Serving on another interface is an explicit option. Treat that as a change to the exposure boundary: use the documented serving options with care, especially when the project history contains private prompts.
What the timeline can—and cannot—tell you
A timeline can make recorded continuity easier to inspect: which prompt preceded a milestone, what the project author says changed, and where a later session resumed an earlier thread. It does not turn the full development process into a verified audit trail. Prompt capture and milestone generation work differently, and milestone content is selected and drafted by an LLM workflow.
The DEV Community article describing the project was posted September 17, 2026, and says it was originally published at GitHub. The repository README documents the implementation and setup. Neither source supplies independent performance testing or measured evidence of accuracy, time saved, or reliability. Developers evaluating it should regard the feature descriptions as project documentation and decide whether the recorded prompts and selected milestones fit their own privacy and continuity needs.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsQuestions to consider for a durable agent-work history
The author’s closing question is useful beyond this plugin: what belongs on a timeline, and how do developers keep track of work that spans many agent sessions? A useful history may need prompt fidelity, decision rationale, rejected alternatives, file context, and explicit links between sessions—but capturing more also means preserving more potentially sensitive project information.
What would you want on a timeline like this, and how do you currently maintain continuity across coding-agent sessions?
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
